Dark energy effectively contributes 75% of the current energy density of the universe. dld.bz/HDrF cosmology SciFri WiredScience

Claire Dederer: Poser: My Life in Twenty-three Yoga Poses: "Carry your child in a sling." Parenting Books dld.bz/Pssq

Domain Age (some of our sites are over 6 years old): Linkvana dld.bz/QjUP

"By the time unions came to strength.. economic development was in private hands." [.. Power in a Union] Books dld.bz/PD7q

Jonathan Alter: "#Obama came to office facing two wars and a cratering economy." [The Promise] Politics Books dld.bz/P6DR

Poser: My Life in 23 Yoga Poses: "Join a baby group so your child could develop peer attachments." Parents Books dld.bz/Pssq

Stephanie Coontz: "We've seen love in the WhiteHouse before, but in many cases it was the.." [A Strange Stirring] Books dld.bz/PvtE

Neurologist and writer Oliver Sacks has spent his career examining patients struggling to survive with Parkinson's. NYT dld.bz/JgwB

Jonathan Alter says Barack Obama has struggled to connect with the American public, yet he's .. [Daily Show Authors] dld.bz/PwcN

Stephanie Coontz: "#Women's problems were social, not personal, in origin." [A Strange Stirring] Feminism Books dld.bz/PvtE